I just installed my Cat-back system this weekend and completed it in one hour without using a lift. I did have to cut the old system just behind the muffler as the tailpipe hung up against the spare tire but I’d imagine this wouldn’t be an issue if the vehicle was on a lift. The fit and finish for the new system is top notch and performance is improved when stomping the pedal….it really lurches at mid RPMS and I haven’t even installed the headers yet! The short time evaluating the mileage has yielded me improvement approximately .3 mpg. I’ll be able to give a more accurate assessment after spending a tank or two of gas to take into account “back to school” traffic and the computer adjusting. The sound is quiet on the outside but inside there is a considerable drone around 2.5K. I’m expecting this to quiet down over the next few hundred miles (I hope) as others with the same issue have noted in these exhaust threads. Since I started typing this, I have added some driving time to the exhaust and it has mellowed slightly.
Overall, I would enthusiastically recommend this system as the fit and finish, quality and performance are superb. I’ve listed some the points I noted during the quick hour of installation:
I shot some WD-40 on the nuts and bolts that were going to be removed. I’ m sure that having a brand new truck with only 700 miles was one of the factors that made this easy.
The instructions provided are detailed and accurate. Removal is front to back, left to right. I also removed the two exhaust hangers in order to drop the system. Once on the ground, I cut the tail pipe off.
As detailed in the instructions, assemble the new exhaust but don’t tighten the nuts until the entire system is installed. When I came to installing the muffler, I installed the hanger that I previously removed after hanging the muffler. I also used a “touch” of multi-purpose grease on the ends of all the exhaust pipes. …everything went together with ease.
The tailpipe was easy to install, just required some twisting to get it over the axle. Once fitted on the muffler, I reinstalled the last hanger and then tightened the entire exhaust. I’m not sure what the “little hockey puck” thing is on the tailpipe, but I reinstalled that as well. The only critical issue (as minor as it is) is installing the chrome tip. To tighten/ clamp it on the tailpipe, an Allen wrench and a box wrench are used to tighten it but due to the proximity to the rear leaf spring and the shallowness of the nut, this can be only accomplished by tightening the Allen screw and not the 10mm nut. This will likely strip before it can be fully tightened to limit movement thus my tip wiggles slightly. I’ll probably have it welded as well as the adjoining pipes off the cats but not the muffler should I elect to swap the muffler at a later date.